I have enabled kernel level IP configuration in my linux kernel and compiled it, but it does not try get any DHCP address. Why?
Is there something extra or special I have to do?
Then add ip=dhcp to the kernel command line and you're good to go.
This enables automatic configuration of IP addresses of devices and of the routing table during kernel boot, based on either information supplied on the kernel command line or by BOOTP or RARP protocols.
So it can't be used with plain DHCP
For using with DHCP you need additional option.